The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 21, 2024
Filed:
Sep. 19, 2019
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Akihiko Yano, Tokyo, JP;
Akihiro Nozaki, Tokyo, JP;
MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo, JP;
Abstract
A method for determining the degree of sludge generation in oil includes: a deteriorated oil generating step ST; a RPVOT testing step ST; a sludge amount measuring step STB; and a determining step ST. The step STgenerates deteriorated oil oxidized by immersing and rotating a pressurized container in a thermostatic bath having a predetermined temperature. The pressurized container is pressurized until the oxygen partial pressure reaches a predetermined pressure higher than the value under atmospheric pressure by adding oil and a copper catalyst, substituting with oxygen, or injecting oxygen or air. The step STA measures an RPVOT residual ratio of a portion of generated deteriorated oil by the RPVOT test. The step STB measures the amount of sludge for a portion of generated deteriorated oil. The step STdetermines the ease of sludge generation from the relationship between the measured RPVOT residual ratio and the amount of sludge.